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I just replaced the block on my 08 Chevy cobalt its a 2.2L 24 valve 4 cylinder most of the sensors were the same an connected right up some I pulled from old block an put on new block except one its on the top right hand side of block lookin under the hood the old block had a hole to mount it the new one did not all systems are workin but I can't get it to fire on any cylinder can anyone help?

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  • Cars & Trucks Master
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That sensor you have left over sounds like a crank sensor. Without it you have no pulse to fire the coils (no spark) The block you installed has no hole for the sensor to read the reluctor wheel on the crankshaft, which it also does not have. Therefore the block is not compatible for crank triggered ignition system. Your new block was MFG. prior to crank triggered ignition feature. See if the block or the head has a provision for conventional distributor as evidenced by the presence of a large freeze plug or welch plug

Posted on Aug 11, 2017

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Can you post a pic of tbe sensor? Is it the knock sensor?


I just replaced the block on my 08 Chevy cobalt - 0996b43f807cbe1d-jnh1p0frnkt3q2fbcpfimq4v-4-2.gif

Posted on Aug 11, 2017

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SOURCE: I just replaced the block on my 08 Chevy cobalt

That must be the crankshaft position sensor. That's what tells the car when to fire. There usually on the bottom of the motor but it's sounding like that's your problem. Could have a bad crank sensor

Posted on May 08, 2014

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That must be the crankshaft position sensor. That's what tells the car when to fire. There usually on the bottom of the motor but it's sounding like that's your problem. Could have a bad crank sensor

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